What is 9x 65x-87x-45x?

Lets do the numbers and the symbols seperatly:+x+x-x- = + (we know this because two negatives make a positive.

Now lets do the numbers9x65x87x45

There is no way for me to format how to do this by hand in this wiki but what you need to do is do the first pair and then multiply by the next and then the next.

9*65 = 585

585*87 = 50895

50895*45 = 2290275

You know it is positive so you can leave it like that.